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在广西武鸣地区以木薯(Manihot esculenta)平地为参照,于2012年7月从能源植物种类筛选(甘蔗(Saccharum officinarum)与木薯)、种植模式(套作与单作)和地形选择(坡地与平地)等方面,对主要能源植物甘蔗和木薯种植地进行了土壤动物和土壤环境质量的调查。结果表明:在甘蔗种植地,土壤动物的数量、多样性、生物学质量均出现了显著下降,特别是生物学质量下降幅度达53%(P=0.032);在木薯平地上套种花生(Arachishy-pogaea)对土壤动物的数量、群落组成及生物学质量无明显影响,但生物多样性显著上升;地形选择对土壤动物的效果明显,坡地的土壤动物数量、生物多样性及生物学质量均出现普遍下降。这些结果表明,木薯比甘蔗更适合长期种植,且通过优化种植模式,选择适当地形还可以缓冲木薯种植过程对土壤生物多样性和土壤质量的负面影响,因此可初步断定在广西可以优先选择木薯作为一种长期发展的能源植物。
Based on the Manihot esculenta landform in Wuming area of Guangxi province, in July 2012, the selection of plant species (Saccharum officinarum and cassava), planting patterns (intercropping and monoculture) and terrain selection Flatland) and other aspects of the main energy plant sugarcane and cassava cultivation sites conducted soil animals and soil environmental quality survey. The results showed that there was a significant decrease in the quantity, diversity and biological quality of soil animals in sugarcane planting areas, especially the biological quality was reduced by 53% (P = 0.032). Arachishy- pogaea had no significant effect on the quantity, community composition and biological quality of soil animal, but the biological diversity increased significantly. The effect of topography on soil fauna was obvious, and the quantity, biodiversity and biological quality of soil animal appeared on the slope decline. These results indicate that cassava is more suitable for long-term planting than sugarcane, and optimization of planting patterns and selection of appropriate topography can also buffer the negative impact of cassava planting on soil biodiversity and soil quality. Therefore, we can conclude that Guangxi can give priority to cassava A long-term energy plant.